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3 years ago

Which characteristic makes nine amino acids “essential”?

Biology

2 answers:

kotykmax [81]3 years ago

8 0

The body can not make them

Aleonysh [2.5K]3 years ago

8 0

The right option is; The body cannot make them.

Amino acids are organic compounds that perform many important roles in the body including building of proteins, and production of neurotransmitters and hormones. Based on some factors, amino acids are grouped into two; essential, and nonessential amino acids. The essential amino acids are the amino acids that the body cannot produce on its own, and must be obtained by eating various foods. The nine essential amino acids are; isoleucine, histidine, leucine, phenylalanine, lysine, tryptophan, methionine, threonine, and valine.

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Blood does not enter or leave the ventricles during the period called

babymother [125]

That would be D. Isovolumic contraction

As the name states during ISOvolumic contraction the volume of the ventricles doesn’t change and stays the same so no blood enters or leaves the ventricles. The thing that changes is the pressure of the ventricles that increases.

I can explain the process more if u want in the comments:)

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3 years ago

Myasthenia gravis is an autoimmune disease in which the immune system gradually destroys the receptors for acetylcholine at the

Alex

<h2>A drug that inhibits acetylcholinesterase.</h2>

Explanation:

Acetylcholine esterase (AChE) inhibitors are viewed as the essential treatment of Myasthenia Gravis (MG).

Edrophonium is basically utilized as an analytic apparatus inferable from its short half-life. Pyridostigmine is utilized for long- time support.

High dosages of corticosteroids regularly are utilized to stifle autoimmunity. Patients with MG additionally might be consuming other immunosuppressive medications (eg, cyclosporine or azathioprine).

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2 years ago

Any will help! Please!!

vodomira [7]

heeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee sorry person

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3 years ago

A large family has a history of multiple aneuploid diseases such as Down Syndrome, trisomy-18 and Klinefelter Syndrome (XXY). Th

SpyIntel [72]

Answer:

Genes coding for proteins involved in chiasma formation.

Explanation:

Chiasma is the connecting link between two non sister chromatids from homologous chromosomes. At chiasma chromosomal crossover takes place in which the genetic material is exchanged between the chromatids. During meiosis aneuploidy occurs if chiasma is absent or impaired due to a mutation in genes encoding for proteins involved in chiasma formation.

Aneuploidy is characterised by presence of abnormal number of chromosomes in cells. They can be 45 or 47 in number apart from the usual 46. Due to impaired chiasma, chromosome pair fails to separate and is passed on to the egg or sperm as it is hence there is one gamete with an extra chromosome and one gamete with a less chromosome. Aneuploidy can result in many genetic disorders like three copies of chromosome 21 can result in Down syndrome.

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3 years ago

Calculate the molarity of 0.75 L of a solution containing 0.83 g of dissolved KCI. A 0.015 M B 0.75 M C 1.1 M D 6.2

marissa [1.9K]

Answer:

A 0.015M

Explanation:

Molarity, which refers to the molar concentration of a solution, can be calculated using the formula:

Molarity (M) = mole (n) / volume (L)

Based on the information provided in this question, the solution contains 0.83 g of dissolved KCI.

We can calculate the number of moles of KCl in the solution by using the formula:

Mole = mass ÷ molar mass

Where atomic mass of; K = 39, Cl = 35.5

Molar Mass of KCl = 39 + 35.5

= 74.5g/mol.

Mole = 0.83g/74.5g/mol.

mole = 0.01114

Approximately, n = 0.011mol

Hence, molarity = 0.011mol/0.75L

Molarity = 0.0146

Molarity = 0.015M

8 0

2 years ago